I'm surprised you are getting this Mhash/s rate in Windows. If you were able to recreate these settings in say the latest stable of Debian or the latest release Ubuntu x86_64 do you think it would be even faster?
I'm surprised you're surprised.
I get 372 MHash at 930 MHz in Debian. If I could run at 1050 MHz like the other guy I should get about 420 MHash.
I'm running this card on Debian @ 950 MHz. On poclbm I'm getting 317 MHash. On phoenix 304 MHash. How are you getting 372 MHash?
EDIT:
also running:
AMD APP SDK v2.4
ATI catalyst & drivers 11.3
I'm getting 360Mh/s on ubuntu. See sig